package com.putao.tinytime.event;

/**
 * Each event handler method has a thread mode, which determines in which thread
 * the method is to be called by EventBus. EventBus takes care of threading
 * independently from the posting thread.
 */
public enum ThreadMode {
	/**
	 * Subscriber will be called in the same thread, which is posting the event.
	 * This is the default. Event delivery implies the least overhead because it
	 * avoids thread switching completely. Thus this is the recommended mode for
	 * simple tasks that are known to complete is a very short time without
	 * requiring the main thread. Event handlers using this mode must return
	 * quickly to avoid blocking the posting thread, which may be the main
	 * thread.
	 */
	PostThread,
	/**
	 * Subscriber will be called in Android's main thread (sometimes referred to
	 * as UI thread). If the posting thread is the main thread, event handler
	 * methods will be called directly. Event handlers using this mode must
	 * return quickly to avoid blocking the main thread.
	 */
	MainThread,
	/**
	 * Subscriber will be called in a background thread. If posting thread is
	 * not the main thread, event handler methods will be called directly in the
	 * posting thread. If the posting thread is the main thread, EventBus uses a
	 * single background thread, that will deliver all its events sequentially.
	 * Event handlers using this mode should try to return quickly to avoid
	 * blocking the background thread.
	 */
	BackgroundThread,
	/**
	 * Event handler methods are called in a separate thread. This is always
	 * independent from the posting thread and the main thread. Posting events
	 * never wait for event handler methods using this mode. Event handler
	 * methods should use this mode if their execution might take some time,
	 * e.g. for network access. Avoid triggering a large number of long running
	 * asynchronous handler methods at the same time to limit the number of
	 * concurrent threads. EventBus uses a thread pool to efficiently reuse
	 * threads from completed asynchronous event handler notifications.
	 */
	Async
}